bio | website | list.seqfan.eu |
---|---|---|
location | FR | |
age | 65 | |
visits | member for | 5 years |
seen | Apr 3 at 16:57 | |
stats | profile views | 341 |
Administrator of the seqfan (Integer Sequences) mailing list and old contributor of Neil Sloane's O.E.I.S. (Wiki version here.)
Jan 19 |
awarded | Necromancer |
Oct 9 |
awarded | Constituent |
Oct 4 |
awarded | Caucus |
Jun 25 |
awarded | Excavator |
Jun 25 |
awarded | Suffrage |
Jun 25 |
awarded | Citizen Patrol |
Feb 8 |
comment |
Mathematical ideas named after places
And there is the Syracusan Square which is a special case of Graeco-Latin square ... |
Oct 11 |
awarded | Nice Answer |
Apr 15 |
awarded | Yearling |
Dec 19 |
awarded | Necromancer |
Apr 16 |
awarded | Yearling |
Aug 28 |
accepted | What is exactly the (singularity) confinement property ? |
Jun 22 |
awarded | Necromancer |
May 29 |
comment |
What are the most misleading alternate definitions in taught mathematics?
@Omar: This definition by subset of the product of domain and codomain is not only a trick. This is a good basis for combinatorial thinking and fits nicely with the various ways of counting fundamental objects. |
May 29 |
comment |
What are the most misleading alternate definitions in taught mathematics?
@Christos: As previously commented there is the 3. about partitions of a set. There are cases where you better use def 1 to prove there is one. In fact we bother discussing many kinds of relations. Before introducing equivalence relations, you can take some time to define strict and inclusive order relations, which are antisymmetric. It prepares you to the fact that all these concepts are related. And is a good preparation for lattice theory. |
May 23 |
awarded | Enthusiast |
May 21 |
comment |
Books you would like to see translated into English.
I am afraid these are (mathematically) of anecdotical interest and that Grothendieck has again recently vetoed translations and publications in any form of his magnus opus. |
May 19 |
comment |
Does every finitely presentable group have a presentation that simultaneously minimizes the number of generators and number of relators?
Except for some classes of presentable groups which are decidable. |
May 18 |
comment |
What should be offered in undergraduate mathematics that's currently not (or isn't usually)?
Of course I agree. But it should also don't hide that their are also functional and difference equations. |
May 17 |
comment |
A place to find original papers
By looking I found that most articles of Sophus Lie were reprinted in a collected works series, edited among others by Engels and published by Teubner in the 1930s. |